llvm/test/Transforms/LoopVectorize/first-order-recurrence-scalable-vf1.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt -p loop-vectorize -scalable-vectorization=on -force-vector-width=1 -force-target-supports-scalable-vectors=true -S %s | FileCheck %s

target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"


define i64 @pr97452_scalable_vf1_for_live_out(ptr %src) {
; CHECK-LABEL: define i64 @pr97452_scalable_vf1_for_live_out(
; CHECK-SAME: ptr [[SRC:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 23, [[TMP0]]
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 23, [[TMP1]]
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 23, [[N_MOD_VF]]
; CHECK-NEXT:    [[TMP3:%.*]] = call i32 @llvm.vscale.i32()
; CHECK-NEXT:    [[TMP4:%.*]] = sub i32 [[TMP3]], 1
; CHECK-NEXT:    [[VECTOR_RECUR_INIT:%.*]] = insertelement <vscale x 1 x i64> poison, i64 0, i32 [[TMP4]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <vscale x 1 x i64> [ [[VECTOR_RECUR_INIT]], %[[VECTOR_PH]] ], [ [[WIDE_LOAD:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[SRC]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD]] = load <vscale x 1 x i64>, ptr [[TMP5]], align 8
; CHECK-NEXT:    [[TMP7:%.*]] = call <vscale x 1 x i64> @llvm.vector.splice.nxv1i64(<vscale x 1 x i64> [[VECTOR_RECUR]], <vscale x 1 x i64> [[WIDE_LOAD]], i32 -1)
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP1]]
; CHECK-NEXT:    [[TMP6:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP6]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP9:%.*]] = call i32 @llvm.vscale.i32()
; CHECK-NEXT:    [[TMP10:%.*]] = sub i32 [[TMP9]], 1
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <vscale x 1 x i64> [[WIDE_LOAD]], i32 [[TMP10]]
; CHECK-NEXT:    [[TMP12:%.*]] = call i32 @llvm.vscale.i32()
; CHECK-NEXT:    [[TMP13:%.*]] = sub i32 [[TMP12]], 1
; CHECK-NEXT:    [[TMP14:%.*]] = extractelement <vscale x 1 x i64> [[TMP7]], i32 [[TMP13]]
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 23, [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[SCALAR_RECUR_INIT:%.*]] = phi i64 [ [[VECTOR_RECUR_EXTRACT]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[FOR:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT]], %[[SCALAR_PH]] ], [ [[L:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i64, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT:    [[L]] = load i64, ptr [[GEP]], align 8
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV]], 22
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP3:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    [[RES:%.*]] = phi i64 [ [[FOR]], %[[LOOP]] ], [ [[TMP14]], %[[MIDDLE_BLOCK]] ]
; CHECK-NEXT:    ret i64 [[RES]]
;
entry:
  br label %loop

loop:
  %for = phi i64 [ 0, %entry ], [ %l, %loop ]
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %iv.next = add i64 %iv, 1
  %gep = getelementptr inbounds i64, ptr %src, i64 %iv
  %l = load i64, ptr %gep, align 8
  %ec = icmp eq i64 %iv, 22
  br i1 %ec, label %exit, label %loop

exit:
  %res = phi i64 [ %for, %loop ]
  ret i64 %res
}


define void @pr97452_scalable_vf1_for_no_live_out(ptr %src, ptr noalias %dst) {
; CHECK-LABEL: define void @pr97452_scalable_vf1_for_no_live_out(
; CHECK-SAME: ptr [[SRC:%.*]], ptr noalias [[DST:%.*]]) {
; CHECK-NEXT:  [[ENTRY:.*]]:
; CHECK-NEXT:    [[TMP0:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT:    [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 23, [[TMP0]]
; CHECK-NEXT:    br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK:       [[VECTOR_PH]]:
; CHECK-NEXT:    [[TMP1:%.*]] = call i64 @llvm.vscale.i64()
; CHECK-NEXT:    [[N_MOD_VF:%.*]] = urem i64 23, [[TMP1]]
; CHECK-NEXT:    [[N_VEC:%.*]] = sub i64 23, [[N_MOD_VF]]
; CHECK-NEXT:    [[TMP3:%.*]] = call i32 @llvm.vscale.i32()
; CHECK-NEXT:    [[TMP4:%.*]] = sub i32 [[TMP3]], 1
; CHECK-NEXT:    [[VECTOR_RECUR_INIT:%.*]] = insertelement <vscale x 1 x i64> poison, i64 0, i32 [[TMP4]]
; CHECK-NEXT:    br label %[[VECTOR_BODY:.*]]
; CHECK:       [[VECTOR_BODY]]:
; CHECK-NEXT:    [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[VECTOR_RECUR:%.*]] = phi <vscale x 1 x i64> [ [[VECTOR_RECUR_INIT]], %[[VECTOR_PH]] ], [ [[WIDE_LOAD:%.*]], %[[VECTOR_BODY]] ]
; CHECK-NEXT:    [[TMP5:%.*]] = getelementptr inbounds i64, ptr [[SRC]], i64 [[INDEX]]
; CHECK-NEXT:    [[WIDE_LOAD]] = load <vscale x 1 x i64>, ptr [[TMP5]], align 8
; CHECK-NEXT:    [[TMP7:%.*]] = call <vscale x 1 x i64> @llvm.vector.splice.nxv1i64(<vscale x 1 x i64> [[VECTOR_RECUR]], <vscale x 1 x i64> [[WIDE_LOAD]], i32 -1)
; CHECK-NEXT:    [[TMP8:%.*]] = getelementptr inbounds i64, ptr [[DST]], i64 [[INDEX]]
; CHECK-NEXT:    store <vscale x 1 x i64> [[TMP7]], ptr [[TMP8]], align 8
; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], [[TMP1]]
; CHECK-NEXT:    [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
; CHECK-NEXT:    br i1 [[TMP9]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP4:![0-9]+]]
; CHECK:       [[MIDDLE_BLOCK]]:
; CHECK-NEXT:    [[TMP11:%.*]] = call i32 @llvm.vscale.i32()
; CHECK-NEXT:    [[TMP12:%.*]] = sub i32 [[TMP11]], 1
; CHECK-NEXT:    [[VECTOR_RECUR_EXTRACT:%.*]] = extractelement <vscale x 1 x i64> [[WIDE_LOAD]], i32 [[TMP12]]
; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 23, [[N_VEC]]
; CHECK-NEXT:    br i1 [[CMP_N]], label %[[EXIT:.*]], label %[[SCALAR_PH]]
; CHECK:       [[SCALAR_PH]]:
; CHECK-NEXT:    [[SCALAR_RECUR_INIT:%.*]] = phi i64 [ [[VECTOR_RECUR_EXTRACT]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    [[BC_RESUME_VAL:%.*]] = phi i64 [ [[N_VEC]], %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
; CHECK-NEXT:    br label %[[LOOP:.*]]
; CHECK:       [[LOOP]]:
; CHECK-NEXT:    [[FOR:%.*]] = phi i64 [ [[SCALAR_RECUR_INIT]], %[[SCALAR_PH]] ], [ [[L:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
; CHECK-NEXT:    [[IV_NEXT]] = add i64 [[IV]], 1
; CHECK-NEXT:    [[GEP:%.*]] = getelementptr inbounds i64, ptr [[SRC]], i64 [[IV]]
; CHECK-NEXT:    [[L]] = load i64, ptr [[GEP]], align 8
; CHECK-NEXT:    [[GEP_DST:%.*]] = getelementptr inbounds i64, ptr [[DST]], i64 [[IV]]
; CHECK-NEXT:    store i64 [[FOR]], ptr [[GEP_DST]], align 8
; CHECK-NEXT:    [[EC:%.*]] = icmp eq i64 [[IV]], 22
; CHECK-NEXT:    br i1 [[EC]], label %[[EXIT]], label %[[LOOP]], !llvm.loop [[LOOP5:![0-9]+]]
; CHECK:       [[EXIT]]:
; CHECK-NEXT:    ret void
;
entry:
  br label %loop

loop:
  %for = phi i64 [ 0, %entry ], [ %l, %loop ]
  %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
  %iv.next = add i64 %iv, 1
  %gep = getelementptr inbounds i64, ptr %src, i64 %iv
  %l = load i64, ptr %gep, align 8
  %gep.dst = getelementptr inbounds i64, ptr %dst, i64 %iv
  store i64 %for, ptr %gep.dst
  %ec = icmp eq i64 %iv, 22
  br i1 %ec, label %exit, label %loop

exit:
  ret void
}
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
; CHECK: [[META2]] = !{!"llvm.loop.unroll.runtime.disable"}
; CHECK: [[LOOP3]] = distinct !{[[LOOP3]], [[META2]], [[META1]]}
; CHECK: [[LOOP4]] = distinct !{[[LOOP4]], [[META1]], [[META2]]}
; CHECK: [[LOOP5]] = distinct !{[[LOOP5]], [[META2]], [[META1]]}
;.